So, where are the scores and scores of trans athletes dominating women's sports? If this is the sort of problem all the people crowing about it think it to be, we should have women with poorly fitting athletic gear and facial hair all over the place taking golds from ciswomen. We don't.
Like this is literally just fucking with transpeople for nothing and I am wide open for correction on this if anybody can find an actual incident of something of note happening, but until then, it's just weird reactionaries screaming into the void as far as I'm concerned, and the outcomes will be largely the same: more invasive procedures for ciswomen to endure, and excluded athletes who did nothing wrong apart from be who they are.
This is a matter of principle, fair play, and safety. Whether it's a tiny number or "scores and scores" is irrelevant.
If you're looking for specific incidents then start with this site. I can't vouch for it being completely accurate but you can use it as a starting point for further research to educate yourself about the issue.
https://www.shewon.org/